Home / 715,460.85-987,120.54-428,876.37

Finding the Fourth Proportional to 715,460.85, 987,120.54 and 428,876.37

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Solution

The fourth proportional to 715,460.85, 987,120.54 and 428,876.37 is: 591,720.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,460.85 : 987,120.54 = 428,876.37 : x
  2. Step 2: Convert to fraction form
    715,460.85/987,120.54 = 428,876.37/x
  3. Step 3: Cross multiply
    715,460.85x = 987,120.54 × 428,876.37
  4. Step 4: Simplify right side
    715,460.85x = 423,352,673,947.64
  5. Step 5: Solve for x
    x = 423,352,673,947.64/715,460.85
  6. Step 6: Final answer
    x = 591,720.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.